Table of Contents
ISRN Biomedical Engineering
Volume 2013 (2013), Article ID 369850, 11 pages
Research Article

0.5 V Cardiac Sense Amplifier Realization Using Log-Domain Filtering

Physics Department, Electronics Laboratory, University of Patras Rio, 26504 Patras, Greece

Received 30 April 2013; Accepted 3 June 2013

Academic Editors: B. Calvo and D. S. Naidu

Copyright © 2013 Christos Giagkoulovits and Costas Psychalinos. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


A novel configuration of a cardiac sense amplifier for pacemakers, realized using the concept of Log-Domain filtering, is introduced in this paper. The analog part of the amplifier operates under a single 0.5 V power supply voltage. Compared to the corresponding already published configuration, the proposed scheme offers the benefits of reduced operating voltage and dc power dissipation. The performance of the intermediate stages, as well as of the whole system, has been evaluated through the utilization of the Analog Design Environment of the Cadence software and, also, the design kit provided by the AMS 0.35 μm CMOS process.